:root {
    --post-bg: transparent;
    --container-width: 850px;
    --forest-green: #2d6a4f;
    --grass-light: #d8f3dc;
    --sky-blue: #e0f2fe;
}

body {
    background: linear-gradient(to bottom, #f0f9ff 0%, #e0f2fe 50%, #f0fdf4 100%);
    color: #1e293b;
    line-height: 1.8;
    position: relative;
    overflow-x: hidden;
    margin: 0;
    padding: 0;
    font-family: system-ui, -apple-system, sans-serif;
}

/* --- ĐỊNH VỊ CỐ ĐỊNH RỪNG THÔNG HAI BÊN ĐỂ KHÔNG ĐẨY TRANG --- */
.side-forest-left,
.side-forest-right {
    position: fixed;
    top: 0;
    height: 100vh;
    width: 280px;
    z-index: 1;
    pointer-events: none;
}
.side-forest-left {
    left: 0;
}
.side-forest-right {
    right: 0;
}

/* --- HÌNH ẢNH BÊN TRONG BÀI VIẾT --- */
#post-detail-container img {
    max-width: 100% !important;
    height: auto !important;
    display: block !important;
    margin: 0 auto 20px auto !important;
    border-radius: 12px;
}

/* --- PHÔNG NỀN MINH HỌA THIÊN NHIÊN & HOẠT HỌA --- */
.decorations-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
    overflow: hidden;
}

/* --- DÀN DÂY LEO VÀ GIỌT NƯỚC RŨ Ở GÓC TRÊN CÙNG --- */
.top-vines-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 120px;
    z-index: 2;
    pointer-events: none;
}
.top-vines {
    width: 100%;
    height: 100%;
}
.water-droplets {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}
.droplet {
    position: absolute;
    width: 2.5px;
    height: 12px;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.9), rgba(224, 242, 254, 0.1));
    border-radius: 50%;
    animation: dropFall linear infinite;
}
.drop-1 { left: 15%; animation-delay: 0.5s; animation-duration: 3.2s; }
.drop-2 { left: 32%; animation-delay: 2.1s; animation-duration: 4s; }
.drop-3 { left: 48%; animation-delay: 0.8s; animation-duration: 3.5s; }
.drop-4 { left: 65%; animation-delay: 3.5s; animation-duration: 4.5s; }
.drop-5 { left: 78%; animation-delay: 1.2s; animation-duration: 3s; }
.drop-6 { left: 91%; animation-delay: 2.7s; animation-duration: 3.8s; }

@keyframes dropFall {
    0% { transform: translateY(0) scaleY(1); opacity: 0; }
    10% { opacity: 0.85; }
    90% { opacity: 0.85; }
    100% { transform: translateY(160px) scaleY(0.6); opacity: 0; }
}

/* Đám mây hoạt họa tự động trôi */
.cloud {
    position: absolute;
    background: rgba(255, 255, 255, 0.85);
    border-radius: 100px;
    box-shadow: 0 8px 24px rgba(255, 255, 255, 0.5);
}
.cloud::before, .cloud::after {
    content: '';
    position: absolute;
    background: rgba(255, 255, 255, 0.85);
    border-radius: 50%;
}
.cloud-1 {
    width: 120px; height: 40px; top: 10%; left: -150px;
    animation: floatCloud 38s linear infinite;
}
.cloud-1::before { width: 50px; height: 50px; top: -20px; left: 15px; }
.cloud-1::after { width: 70px; height: 70px; top: -35px; right: 15px; }

.cloud-2 {
    width: 180px; height: 50px; top: 25%; right: -200px;
    animation: floatCloudReverse 48s linear infinite;
    opacity: 0.75;
}
.cloud-2::before { width: 70px; height: 70px; top: -30px; left: 20px; }
.cloud-2::after { width: 90px; height: 90px; top: -45px; right: 25px; }

.cloud-3 {
    width: 100px; height: 35px; top: 6%; right: -150px;
    animation: floatCloudReverse 32s linear infinite;
    opacity: 0.6;
}
.cloud-3::before { width: 40px; height: 40px; top: -15px; left: 10px; }
.cloud-3::after { width: 55px; height: 55px; top: -25px; right: 10px; }

.cloud-4 {
    width: 150px; height: 45px; top: 38%; left: -180px;
    animation: floatCloud 52s linear infinite;
    opacity: 0.7;
}
.cloud-4::before { width: 60px; height: 60px; top: -25px; left: 18px; }
.cloud-4::after { width: 80px; height: 80px; top: -40px; right: 20px; }

.cloud-5 {
    width: 90px; height: 30px; top: 18%; left: -100px;
    animation: floatCloud 44s linear infinite;
    opacity: 0.55;
}
.cloud-5::before { width: 35px; height: 35px; top: -15px; left: 10px; }
.cloud-5::after { width: 45px; height: 45px; top: -22px; right: 10px; }

@keyframes floatCloud {
    0% { transform: translateX(0); }
    100% { transform: translateX(calc(100vw + 300px)); }
}
@keyframes floatCloudReverse {
    0% { transform: translateX(0); }
    100% { transform: translateX(calc(-100vw - 350px)); }
}

/* Lá phong cách anime rơi nhẹ nhàng */
.falling-leaf {
    position: absolute;
    width: 18px;
    height: 12px;
    background: linear-gradient(135deg, #52b788, #2d6a4f);
    border-radius: 0 100% 0 100%;
    opacity: 0;
    pointer-events: none;
    z-index: 1;
    box-shadow: 1px 1px 3px rgba(0,0,0,0.1);
    animation: naturalFall 14s linear infinite;
}

.leaf-1 { left: 6%; top: -5%; animation-delay: 0s; animation-duration: 13s; }
.leaf-2 { left: 18%; top: -5%; animation-delay: 4.5s; animation-duration: 16s; }
.leaf-3 { left: 29%; top: -5%; animation-delay: 2s; animation-duration: 14s; }
.leaf-4 { left: 43%; top: -5%; animation-delay: 8s; animation-duration: 17s; }
.leaf-5 { left: 54%; top: -5%; animation-delay: 0.8s; animation-duration: 15s; }
.leaf-6 { left: 66%; top: -5%; animation-delay: 5s; animation-duration: 12s; }
.leaf-7 { left: 76%; top: -5%; animation-delay: 3.5s; animation-duration: 18s; }
.leaf-8 { left: 88%; top: -5%; animation-delay: 9s; animation-duration: 14s; }
.leaf-9 { left: 12%; top: -5%; animation-delay: 11s; animation-duration: 15s; }
.leaf-10 { left: 35%; top: -5%; animation-delay: 6s; animation-duration: 16s; }
.leaf-11 { left: 58%; top: -5%; animation-delay: 12s; animation-duration: 13s; }
.leaf-12 { left: 82%; top: -5%; animation-delay: 1s; animation-duration: 17s; }

@keyframes naturalFall {
    0% { 
        transform: translateY(-20px) translateX(0) rotate(0deg); 
        opacity: 0; 
    }
    10% { 
        opacity: 0.85; 
    }
    90% { 
        opacity: 0.85; 
    }
    100% { 
        transform: translateY(105vh) translateX(120px) rotate(540deg); 
        opacity: 0; 
    }
}

/* --- THANH ĐIỀU HƯỚNG LIQUID GLASS --- */
.post-nav {
    background: rgba(255, 255, 255, 0.4) !important; 
    backdrop-filter: blur(10px) !important; 
    -webkit-backdrop-filter: blur(10px) !important;
    
    padding: 12px 0;
    position: relative;
    margin: 30px auto 0;
    max-width: var(--container-width);
    width: 90%;
    border-radius: 40px;
    z-index: 1000;
    border: 1px solid rgba(255, 255, 255, 0.5) !important;
    box-shadow: 
        inset 0 1.5px 0 0 rgba(255, 255, 255, 0.6),
        0 8px 25px rgba(0, 0, 0, 0.02) !important;
}
.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 24px;
}

.back-link {
    text-decoration: none;
    color: #334155;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
    font-size: 0.95rem;
}

.back-link:hover {
    color: var(--forest-green);
    transform: translateX(-5px);
}

.nav-logo {
    height: 35px;
    border-radius: 8px;
}

/* --- KHUNG HIỂN THỊ KÍNH MỜ GRADIENT NHẸ --- */
body #post-detail-container {
    /* Khử bỏ hoàn toàn nền, viền, bóng đổ và padding của khung ngoài */
    background: transparent !important;
    background-color: transparent !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important; /* Loại bỏ khoảng trống thừa tạo ra lớp viền ngoài */

    /* Giữ vai trò làm khung giới hạn độ rộng chuẩn 850px */
    max-width: var(--container-width) !important; /* 850px */
    width: 90% !important;
    margin: 40px auto !important;
    box-sizing: border-box !important;
    position: relative !important;
    z-index: 5 !important;
}
/* --- HỆ THỐNG DÂY LEO ĐÈ QUẤN VIỀN KÍNH --- */
.glass-vine {
    position: absolute;
    width: 110px;
    height: 110px;
    pointer-events: none;
    z-index: 6; 
    filter: drop-shadow(2px 4px 6px rgba(0, 0, 0, 0.15));
    transition: transform 0.3s ease;
}
.glass-vine-tr {
    top: -12px;
    right: -12px;
}
.glass-vine-bl {
    bottom: -12px;
    left: -12px;
}

/* --- SKELETON LOADING --- */
.loading-state {
    text-align: center;
    padding: 100px 0;
    color: #64748b;
}

.spinner {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--forest-green);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    100% { transform: rotate(360deg); }
}

/* --- ĐẤY TRANG HÌNH ĐỒI CỎ & FOOTER ĐỒNG BỘ --- */
.footer-grass-wrapper {
    position: relative;
    margin-top: 100px;
    z-index: 10;
}

.grass-wave {
    display: block;
    width: 100%;
    height: 60px;
    margin-bottom: -5px;
}

.post-footer {
    background: #2d6a4f;
    color: #e8f5e9;
    padding: 50px 20px;
    text-align: center;
    border-top: none;
}

.post-footer h3 {
    letter-spacing: 2px;
    font-weight: 800;
    margin-bottom: 10px;
    color: #ffffff;
}

.post-footer p {
    opacity: 0.8;
    font-size: 0.9rem;
}

/* --- NÚT CHIA SẺ NĂNG ĐỘNG --- */
body #post-detail-container .share-btn-title {
    background: rgba(255, 255, 255, 0.8) !important; 
    border: 1px solid rgba(226, 232, 240, 0.8) !important; 
    color: #334155 !important;
    font-size: 1.1rem !important;
    cursor: pointer !important;
    width: 38px !important;
    height: 38px !important;
    border-radius: 50% !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275) !important;
    margin-left: 15px !important;
    flex-shrink: 0 !important;
    vertical-align: middle !important;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05) !important;
}

/* HIỆU ỨNG KÍNH MÀU XANH LÁ + ICON VÀNG KHI DI CHUỘT (HOVER) */
body #post-detail-container .share-btn-title:hover {
    background: rgba(45, 106, 79, 0.3) !important; 
    backdrop-filter: blur(5px) !important;
    -webkit-backdrop-filter: blur(5px) !important;
    color: #ffca3a !important; 
    border: 1px solid rgba(45, 106, 79, 0.6) !important; 
    transform: scale(1.15) rotate(10deg) !important;
    box-shadow: 
        inset 0 1px 1px 0 rgba(255, 255, 255, 0.4),
        0 4px 15px rgba(45, 106, 79, 0.3) !important;
}
/* ==========================================================================
   ĐỊNH DẠNG BẢNG (TABLE) VÀ NỘI DUNG TỪ EDITOR CHO BÀI VIẾT
   ========================================================================== */

#post-detail-container table {
    border-collapse: collapse;
    width: 100%;
    margin: 20px 0;
    background-color: #ffffff;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

#post-detail-container table th,
#post-detail-container table td {
    border: 1px solid #cbd5e1;
    padding: 14px 18px;
    vertical-align: top;
    font-size: 1rem;
    color: #334155;
}

#post-detail-container table th {
    background-color: #f8fafc;
    font-weight: 700;
    color: #0f172a;
    text-align: left;
}

#post-detail-container table tr:nth-child(even) {
    background-color: #f1f5f9; /* Hiệu ứng sọc ngựa vằn giúp dễ đọc */
}

#post-detail-container table tr:hover {
    background-color: #e2e8f0; /* Đổi màu nhẹ khi rê chuột vào dòng */
}

/* Định dạng các thẻ cơ bản khác (nếu lỡ AI/Editor sinh ra) */
#post-detail-container ul { padding-left: 20px; }
#post-detail-container blockquote {
    border-left: 4px solid #0062ff;
    background: #f0f9ff;
    padding: 15px 20px;
    margin: 15px 0;
    border-radius: 0 8px 8px 0;
    font-style: italic;
}
/* --- ĐIỀU CHỈNH RESPONSIVE TỐI ƯU RIÊNG CHO DI ĐỘNG --- */
@media (max-width: 768px) {
    /* Lược bỏ hoàn toàn mây, dây leo rũ, dây leo góc và rừng thông hai bên */
    .cloud,
    .top-vines-container,
    .glass-vine,
    .side-forest-left,
    .side-forest-right {
        display: none !important;
    }

    /* ẨN SVG CŨ TRONG HTML ĐỂ TRÁNH LỆCH KHỚP NỔI */
    .grass-wave {
        display: none !important;
    }

    /* Tối ưu hóa thanh điều hướng mỏng nhẹ */
    .post-nav {
        margin: 15px auto 0;
        width: 92%;
        border-radius: 20px;
        padding: 8px 0;
    }
    .nav-content {
        padding: 0 16px;
    }
    .back-link {
        font-size: 0.85rem;
        gap: 6px;
    }
    .nav-logo {
        height: 28px;
    }

    /* Khung nội dung kính mờ trên di động */
body #post-detail-container {
    width: 92% !important;
    padding: 0 !important; /* Đặt về 0 để không tạo khoảng cách viền đúp */
    margin: 20px auto !important;
    border-radius: 0 !important; 
    background: transparent !important; /* Chuyển hoàn toàn thành trong suốt */
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    border: none !important;
    box-shadow: none !important;
}

    #post-detail-container h1 {
        font-size: 1.6rem !important;
        line-height: 1.35 !important;
        margin-top: 10px !important;
        margin-bottom: 15px !important;
    }
    #post-detail-container h2 {
        font-size: 1.3rem !important;
    }

    /* Giảm nhẹ kích thước lá rơi */
    .falling-leaf {
        width: 14px;
        height: 10px;
    }

    /* TẠO GRADIENT CHUYỂN TIẾP MƯỜT MÀ VỚI BODY */
    .footer-grass-wrapper {
        position: relative;
        margin-top: 120px;
        z-index: 10;
        background-color: #2d6a4f !important;
    }
    
    .footer-grass-wrapper::before {
        content: '';
        position: absolute;
        top: -80px;
        left: 0;
        width: 100%;
        height: 80px;
        z-index: 1;
        pointer-events: none;
        background: linear-gradient(
            to bottom, 
            rgba(240, 253, 244, 0) 0%, 
            rgba(45, 106, 79, 0.25) 100%
        ) !important;
    }

    /* VẼ ĐỒNG NHẤT SÓNG CỎ + THẢM CỎ ĐẬU PHỘNG + HOA VÀNG RƠI KHÔNG VẾT GHÉP */
    .footer-grass-wrapper::after {
        content: '';
        position: absolute;
        top: -69px; 
        left: 0;
        width: 100%;
        height: 70px;
        z-index: 12;
        pointer-events: none;
        background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 180 70' width='180' height='70'%3E%3Cpath d='M0,70 L180,70 L180,36 Q135,40 90,36 Q45,32 0,36 Z' fill='%231b4332'/%3E%3Cpath d='M0,70 L180,70 L180,30 Q135,34 90,30 Q45,26 0,30 Z' fill='%232d6a4f'/%3E%3Cellipse cx='15' cy='42' rx='12' ry='7' fill='%231b4332' transform='rotate(-10 15 42)'/%3E%3Cellipse cx='32' cy='45' rx='14' ry='8' fill='%232d6a4f' transform='rotate(15 32 45)'/%3E%3Cellipse cx='50' cy='39' rx='11' ry='6' fill='%2340916c' transform='rotate(-25 50 39)'/%3E%3Cellipse cx='68' cy='43' rx='13' ry='8' fill='%231b4332' transform='rotate(10 68 43)'/%3E%3Cellipse cx='86' cy='40' rx='11' ry='6' fill='%232d6a4f' transform='rotate(-15 86 40)'/%3E%3Cellipse cx='104' cy='45' rx='14' ry='8' fill='%2340916c' transform='rotate(20 104 45)'/%3E%3Cellipse cx='122' cy='39' rx='11' ry='6' fill='%231b4332' transform='rotate(-25 122 39)'/%3E%3Cellipse cx='142' cy='43' rx='13' ry='8' fill='%232d6a4f' transform='rotate(10 142 43)'/%3E%3Cellipse cx='162' cy='41' rx='11' ry='7' fill='%2340916c' transform='rotate(-12 162 41)'/%3E%3Cellipse cx='175' cy='44' rx='12' ry='8' fill='%231b4332' transform='rotate(8 175 44)'/%3E%3Cpath d='M25,42 Q21,26 18,15 M48,39 Q46,24 44,13 M75,43 Q72,27 70,17 M102,45 Q100,29 98,18 M130,41 Q132,25 134,14 M152,43 Q154,28 155,19' stroke='%2340916c' stroke-width='1.2' fill='none'/%3E%3Cpath d='M18,15 C14,11 11,13 16,8 C18,10 18,13 18,15 Z M18,15 C22,11 25,13 20,8 C18,10 18,13 18,15 Z' fill='%23ffca3a'/%3E%3Ccircle cx='18' cy='12' r='1.8' fill='%23ff924c'/%3E%3Cpath d='M44,13 C40,9 37,11 42,6 C44,8 44,11 44,13 Z M44,13 C48,9 51,11 46,6 C44,8 44,11 44,13 Z' fill='%23ffca3a'/%3E%3Ccircle cx='44' cy='10' r='1.8' fill='%23ff924c'/%3E%3Cpath d='M70,17 C66,13 63,15 68,10 C70,12 70,15 70,17 Z M70,17 C74,13 77,15 72,10 C70,12 70,15 70,17 Z' fill='%23ffca3a'/%3E%3Ccircle cx='70' cy='14' r='1.8' fill='%23ff924c'/%3E%3Cpath d='M98,18 C94,14 91,16 96,11 C98,13 98,16 98,18 Z M98,18 C102,14 105,16 100,11 C98,13 98,16 98,18 Z' fill='%23ffca3a'/%3E%3Ccircle cx='98' cy='15' r='1.8' fill='%23ff924c'/%3E%3Cpath d='M134,14 C130,10 127,12 132,7 C134,9 134,12 134,14 Z M134,14 C138,10 141,12 136,7 C134,9 134,12 134,14 Z' fill='%23ffca3a'/%3E%3Ccircle cx='134' cy='11' r='1.8' fill='%23ff924c'/%3E%3Cpath d='M155,19 C151,15 148,17 153,12 C155,14 155,17 155,19 Z M155,19 C159,15 162,17 157,12 C155,14 155,17 155,19 Z' fill='%23ffca3a'/%3E%3Ccircle cx='155' cy='16' r='1.8' fill='%23ff924c'/%3E%3Cpath d='M30,45 C27,43 26,44 29,41 Z M30,45 C33,43 34,44 31,41 Z' fill='%23ffca3a' transform='rotate(45 30 45)'/%3E%3Cpath d='M60,43 C58,41 57,42 59,40 Z' fill='%23ffca3a' transform='rotate(-20 60 43)'/%3E%3Cpath d='M115,46 C112,44 111,45 114,42 Z M115,46 C118,44 119,45 116,42 Z' fill='%23ffca3a' transform='rotate(-60 115 46)'/%3E%3Cpath d='M140,44 C138,42 137,43 139,41 Z' fill='%23ffca3a' transform='rotate(15 140 44)'/%3E%3C/svg%3E");
        background-repeat: repeat-x;
        background-size: 180px 70px;
    }
    /* Tự động tạo thanh cuộn ngang cho Bảng nếu xem trên màn hình nhỏ */
    #post-detail-container table {
        display: block !important;
        overflow-x: auto !important;
        white-space: normal !important;
        -webkit-overflow-scrolling: touch;
    }
}